Celebrate destiny, by the sound of it (4)
I believe the answer is:
fete
'celebrate' is the definition.
(synonyms)
'destiny by the sound of it' is the wordplay.
'destiny' becomes 'fate' (synonyms).
'by the sound of it' shows a homophone (sound like).
'fate' is a homophone of 'FETE'.
(Other definitions for fete that I've seen before include "Elaborate outdoor party" , "Charity garden party" , "Entertain regally" , "Festival event" , "Outdoor get-together" .)